A Becker et al 2007 J. Phys.: Conf. Ser. 88 012045 doi:10.1088/1742-6596/88/1/012045
A Becker1, C Ruiz1, S Baier1 and L Plaja2
Show affiliationsWe present a model for ab-initio calculations of the interaction of two-electron atoms and molecules with few-cycle pulses of intense linearly polarised Ti:sapphire laser radiation. In the model the center-of-mass motion of the two electrons is restricted along the polarisation direction axis, while its relative coordinate and, hence, the electron correlation is retained in its full dimensionality. Results of numerical simulations exhibit the two pathways to nonsequential double ionization, namely the emission of a highly correlated electron pair upon rescattering and a delayed electron emission from a previously excited ion. Comparisons with the results of the usual one-dimensional approximation, in which the direction of each electron is restricted to the polarisation axis, are given. Distributions of the center-of-mass momentum and the correlated electron momenta along the polarisation direction are in qualitative agreement with the experimental data.
31.15.A- Ab initio calculations
34.80.Gs Molecular excitation and ionization
31.15.vj Electron correlation calculations for atoms and ions: excited states
Issue 1 (2007)
A Becker et al 2007 J. Phys.: Conf. Ser. 88 012045
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